If you have an iPhone, iPod Touch, or iPad, and you have a child, this playable Angry Birds birthday cake will need no justification.



Have an Anger-friendly device, but haven't picked up the game? Angry Birds is the best unproductive $5 (see correction) app we've ever bought.

(Correction: The iPhone/iPod Touch edition of Angry Birds is $0.99! The $4.99 version is for the iPad (it's an "HD" edition). We own the $0.99 version a couple times over and it works just great. Sorry for any confusion!)

An Angry Birds case, on the other hand (also available for the iPod Touch), will run you a helmet-cracking $35.